When do I use sum = −b/a, product = c/a in Quadratic Equations, and what does it mean?
Vieta's relations between roots and coefficients.
sum = −b/a, product = c/a — Vieta's relations between roots and coefficients. Use it when: quadratic with roots α, β. Always check the condition holds before plugging in numbers.
Key point
sum = −b/a, product = c/a
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